Openocd how to implement watchpoint in cortex_a.c ?

[fatalfeel]

how to implement in cortex_a.c ?

////

in cortex_m.h

#define DWT_COMP0    0xE0001020

#define DWT_MASK0    0xE0001024

#define DWT_FUNCTION0    0xE0001028

//

in cortex_m.c

for (i = 0; i < cm->dwt_num_comp; i++, comparator++)

    {

        int j;

        comparator->dwt_comparator_address = DWT_COMP0 + 0x10 * i;

        for (j = 0; j < 3; j++, reg++)

            cortex_m_dwt_addreg(target, cache->reg_list + reg, dwt_comp + 3 * i + j);

        target_write_u32(target, comparator->dwt_comparator_address + 8, 0);

    }

//do add watchpoint

comparator->comp = watchpoint->address;

    target_write_u32(target, comparator->dwt_comparator_address + 0, comparator->comp);

    comparator->mask = mask;

    target_write_u32(target, comparator->dwt_comparator_address + 4, comparator->mask);

    switch (watchpoint->rw)

    {

        case WPT_READ:

            comparator->function = 5;

            break;

        case WPT_WRITE:

            comparator->function = 6;

            break;

        case WPT_ACCESS:

            comparator->function = 7;

            break;

    }

    target_write_u32(target, comparator->dwt_comparator_address + 8, comparator->function);

////////////////////////////

in armv7a.h for cortex a8 a9

#define CPUDBG_WVR_BASE        0x180

#define CPUDBG_WCR_BASE        0x1C0

how to implement in cortex_a.c ?

1. the address/mask/function is CPUDBG_WVR_BASE+0 / CPUDBG_WVR_BASE+4 / CPUDBG_WVR_BASE+8 ?

2. the address/mask/function is CPUDBG_WCR_BASE+0 ......+4......+8?

3. WPT_READ/WPT_WRITE/WPT_ACCESS  is 5/6/7 on cortex a8 a9?

[fatalfeel · Accepted solution]

SparkFun Electronics • View topic - Help implement openocd in cortex_a a8 a9 watchpoint~~

done it~~~~

[fatalfeel]

ok may a little idea here

break

http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0388e/Babcdabj.html

watch

http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0388e/Babhjfhh.html

looks

break point reg / watch point reg

Breakpoint address mask =  Watchpoint address mask

Secure state access control = Secure state access control

Byte address select = Byte address select

sp =sp

B = E

only implement     watch point L/S -> Load store access

good~~~ will do it right~~~